42407447 has 4 divisors (see below), whose sum is σ = 42519720. Its totient is φ = 42295176.

The previous prime is 42407441. The next prime is 42407461. The reversal of 42407447 is 74470424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42407447 - 2⁸ = 42407191 is a prime.

It is a super-2 number, since 2×42407447² = 3596783122115618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42407441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55568 + ... + 56325.

It is an arithmetic number, because the mean of its divisors is an integer number (10629930).

Almost surely, 2^42407447 is an apocalyptic number.

42407447 is a deficient number, since it is larger than the sum of its proper divisors (112273).

42407447 is a wasteful number, since it uses less digits than its factorization.

42407447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112272.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 42407447 is about 6512.1000453003. The cubic root of 42407447 is about 348.7230940647.

The spelling of 42407447 in words is "forty-two million, four hundred seven thousand, four hundred forty-seven".